:root {
  --bg: #c0c0c0;
  --panel: #d4d0c8;
  --panel-dark: #808080;
  --text: #000000;
  --led-green: #00ff00;
  --led-red: #ff0000;
  --led-yellow: #ffff00;
  --led-off: #404040;
  --lcd-bg: #1e3a29;
  --lcd-text: #7fff00;
  --grid: #a0a0a0;
  --btn-face: #c0c0c0;
  --alarm-bg: #ff0000;
  --alarm-text: #ffffff;
}

* { 
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body { height: 100%; }

body {
  font-family: "MS Sans Serif", Tahoma, sans-serif;
  font-size: 11px;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: auto;
}

/* Title Bar */
.titlebar {
  background: linear-gradient(to right, #000080, #1084d0);
  color: white;
  padding: 2px 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: bold;
  font-size: 11px;
}

.titlebar .left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.system-icon {
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, #808080, #c0c0c0);
  border: 1px solid #000;
}

/* Main Toolbar */
.toolbar {
  background: var(--panel);
  border-top: 2px solid #ffffff;
  border-bottom: 2px solid #808080;
  padding: 4px;
  display: flex;
  gap: 1px;
  align-items: center;
}

.toolbar-btn {
  background: var(--btn-face);
  border: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  padding: 4px 8px;
  font-size: 11px;
  cursor: pointer;
  min-width: 60px;
}

.toolbar-btn:active {
  border-color: #808080 #ffffff #ffffff #808080;
}

.toolbar-sep {
  width: 1px;
  height: 20px;
  background: #808080;
  margin: 0 4px;
}

/* Status Bar */
.statusbar {
  background: var(--panel);
  border-top: 1px solid #808080;
  padding: 2px 6px;
  display: flex;
  gap: 20px;
  align-items: center;
  position: sticky;
  bottom: 0;
  font-size: 10px;
}

.status-field {
  border: 1px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  padding: 2px 6px;
  background: #ffffff;
  min-width: 100px;
}

.status-time {
  margin-left: auto;
}

/* Main Container */
.container {
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 8px;
  max-width: 1400px;
  margin: 0 auto;
}

/* Panels */
.panel {
  background: var(--panel);
  border: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
}

.panel-title {
  background: var(--panel-dark);
  color: white;
  padding: 2px 6px;
  font-weight: bold;
  border-bottom: 1px solid #000000;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.panel-body {
  padding: 8px;
}

/* Sensor Display */
.sensor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.sensor {
  border: 1px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  background: var(--lcd-bg);
  padding: 6px;
  font-family: "Courier New", monospace;
}

.sensor-label {
  color: #5f9f5f;
  font-size: 9px;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.sensor-value {
  color: var(--lcd-text);
  font-size: 18px;
  font-weight: bold;
  text-shadow: 0 0 5px rgba(127, 255, 0, 0.5);
}

.sensor-unit {
  color: #5f9f5f;
  font-size: 10px;
  margin-left: 4px;
}

/* Alarm Panel */
.alarm-list {
  max-height: 150px;
  overflow-y: auto;
  border: 1px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  background: white;
  font-family: "Courier New", monospace;
  font-size: 10px;
}

.alarm-row {
  display: grid;
  grid-template-columns: 80px 60px 1fr;
  padding: 2px 4px;
  border-bottom: 1px solid #c0c0c0;
}

.alarm-row.critical {
  background: var(--alarm-bg);
  color: var(--alarm-text);
  animation: alarm-flash 1s infinite;
}

.alarm-row.warning {
  background: #ffff00;
}

.alarm-row.normal {
  background: #90ee90;
}

@keyframes alarm-flash {
  50% { background: #ff6666; }
}

/* LED Indicators */
.led-panel {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.led-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.led {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid #000;
  background: var(--led-off);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.5);
}

.led.green-on {
  background: var(--led-green);
  box-shadow: 0 0 8px var(--led-green);
}

.led.red-on {
  background: var(--led-red);
  box-shadow: 0 0 8px var(--led-red);
}

.led.yellow-on {
  background: var(--led-yellow);
  box-shadow: 0 0 8px var(--led-yellow);
}

.led-label {
  font-size: 10px;
  text-transform: uppercase;
}

/* Project Links (styled as SCADA buttons) */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 6px;
}

.project-btn {
  background: var(--btn-face);
  border: 2px solid;
  border-color: #ffffff #808080 #808080 #ffffff;
  padding: 12px 8px;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  display: block;
  font-size: 10px;
  position: relative;
}

.project-btn:hover {
  background: #b0b0b0;
}

.project-btn:active {
  border-color: #808080 #ffffff #ffffff #808080;
}

.project-icon {
  width: 32px;
  height: 32px;
  margin: 0 auto 4px;
  background: #808080;
  border: 1px solid #000;
}

/* Trend Chart */
.trend-chart {
  height: 200px;
  background: #000000;
  border: 1px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  position: relative;
  overflow: hidden;
}

.trend-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: 
    repeating-linear-gradient(0deg, #003300 0, #003300 1px, transparent 1px, transparent 20px),
    repeating-linear-gradient(90deg, #003300 0, #003300 1px, transparent 1px, transparent 20px);
}

/* Ensure the canvas overlays the grid and scales with the container */
#trend-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
}

.wide { grid-column: span 2; }
.tall { grid-row: span 2; }

/* Mimic Display */
.mimic {
  background: #e0e0e0;
  border: 1px solid;
  border-color: #808080 #ffffff #ffffff #808080;
  padding: 8px;
  min-height: 150px;
  position: relative;
}

.pipe {
  position: absolute;
  background: #606060;
  border: 1px solid #000;
}

.pipe.h { height: 4px; }
.pipe.v { width: 4px; }

.pump {
  position: absolute;
  width: 30px;
  height: 30px;
  background: #808080;
  border: 2px solid #000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 9px;
}

.pump.running {
  background: #00ff00;
  animation: pump-rotate 2s linear infinite;
}

@keyframes pump-rotate {
  100% { transform: rotate(360deg); }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Responsive */
@media (max-width: 768px) {
  .container { grid-template-columns: 1fr; }
  .wide { grid-column: span 1; }
}